I used granulated garlic for a couple of years and decided it did zilch to keep the bugs away. Am thinking of mainly the bad Tick problem we have here.
This year though I switched to fresh garlic after doing some reading about it and while they are still getting a few bugs they certainly are getting less.
We have a couple that aren't getting fed and they can have masses of ticks on them poor things.
I use a $2.00 shop garlic crusher to get the best of the juice out and then just chuck the in with the feed.
Life isn't about how to survive the storm,
but how to dance in the rain.